Research Of CA Model In Urban Morphology Of Changchun

The city itself is a typical complex dynamic system,its spatial expansion is the natural,social,economic,cultural,political and legal,and other factors,the urban space form is an important content of geography study for a long time.Under the background of the new normal,urban spatial form evolution and its more and more strongly linked to economic and social development.In this study inductive combing urban morphology evolution,cellular automata,the BP neural network based on relevant theories,through access to changchun city history data,analyzes the process of changchun city spatial form evolution and characteristics,factors affecting urban morphology evolution is studied and the coupling relationship between economic and social development.On this basis,according to the strategic goals of the regional central city in northeast Asia,predict changchun future economy,population,land use scale,and based on coupling the BP neural network was established through Matlab platform of urban space evolution of cellular automata model,deduced the changchun urban form future development pattern,and from the city localization,the urban function,regional transportation,ecological environment,urban and rural areas as a whole,put forward the corresponding optimization path suggestion to space control,optimization of changchun city for the future construction and reasonable development,rules and work more orderly advance provide certain theoretical guidance and practical reference.The main conclusions are as follows:1.Concentric circle expansion to point axis expansion mode evolution.Through the "five vertical and six vertical" urban expressway system and rapid rail transit network construction,Changchun Citygradually form a "multi-center,scattered groups,axial expansion" of the urban development pattern.2.The focus of urban construction land to Changchun New District and the south of the new city,the direction of the western city to expand.3.Urban transport infrastructure construction is the main factor affecting the evolution of urban spatial form in Changchun City.4.Changchun city spatial evolution stage is still in the extension of expansion period.To 2049,Changchun urban area can be built construction land 1180-1370 square kilometers of the international metropolitan area.5.Different stages of urban form prediction will guide the regional major public infrastructure construction,promote the integration of urban and rural development in Changchun City.